pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / pcmcia / au1000_xxs1500.c
blobce9d5c44a7b5a8253dc8d553f20b9a246cf38830
1 /*
3 * MyCable board specific pcmcia routines.
5 * Copyright 2003 MontaVista Software Inc.
6 * Author: Pete Popov, MontaVista Software, Inc.
7 * ppopov@mvista.com or source@mvista.com
9 * ########################################################################
11 * This program is free software; you can distribute it and/or modify it
12 * under the terms of the GNU General Public License (Version 2) as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 * for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
24 * ########################################################################
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/delay.h>
31 #include <linux/ioport.h>
32 #include <linux/kernel.h>
33 #include <linux/tqueue.h>
34 #include <linux/timer.h>
35 #include <linux/mm.h>
36 #include <linux/proc_fs.h>
37 #include <linux/types.h>
39 #include <pcmcia/cs_types.h>
40 #include <pcmcia/cs.h>
41 #include <pcmcia/ss.h>
42 #include <pcmcia/bulkmem.h>
43 #include <pcmcia/cistpl.h>
44 #include <pcmcia/bus_ops.h>
45 #include "cs_internal.h"
47 #include <asm/io.h>
48 #include <asm/irq.h>
49 #include <asm/system.h>
51 #include <asm/au1000.h>
52 #include <asm/au1000_pcmcia.h>
54 #define PCMCIA_MAX_SOCK 0
55 #define PCMCIA_NUM_SOCKS (PCMCIA_MAX_SOCK + 1)
56 #define PCMCIA_IRQ AU1000_GPIO_4
58 #if 0
59 #define DEBUG(x,args...) printk(__FUNCTION__ ": " x,##args)
60 #else
61 #define DEBUG(x,args...)
62 #endif
64 static int xxs1500_pcmcia_init(struct pcmcia_init *init)
66 return PCMCIA_NUM_SOCKS;
69 static int xxs1500_pcmcia_shutdown(void)
71 /* turn off power */
72 au_writel(au_readl(GPIO2_PINSTATE) | (1<<14)|(1<<30),
73 GPIO2_OUTPUT);
74 au_sync_delay(100);
76 /* assert reset */
77 au_writel(au_readl(GPIO2_PINSTATE) | (1<<4)|(1<<20),
78 GPIO2_OUTPUT);
79 au_sync_delay(100);
80 return 0;
84 static int
85 xxs1500_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
87 u32 inserted; u32 vs;
88 unsigned long gpio, gpio2;
90 if(sock > PCMCIA_MAX_SOCK) return -1;
92 gpio = au_readl(SYS_PINSTATERD);
93 gpio2 = au_readl(GPIO2_PINSTATE);
95 vs = gpio2 & ((1<<8) | (1<<9));
96 inserted = (!(gpio & 0x1) && !(gpio & 0x2));
98 state->ready = 0;
99 state->vs_Xv = 0;
100 state->vs_3v = 0;
101 state->detect = 0;
103 if (inserted) {
104 switch (vs) {
105 case 0:
106 case 1:
107 case 2:
108 state->vs_3v=1;
109 break;
110 case 3: /* 5V */
111 default:
112 /* return without setting 'detect' */
113 printk(KERN_ERR "au1x00_cs: unsupported VS\n",
114 vs);
115 return;
117 state->detect = 1;
120 if (state->detect) {
121 state->ready = 1;
124 state->bvd1= gpio2 & (1<<10);
125 state->bvd2 = gpio2 & (1<<11);
126 state->wrprot=0;
127 return 1;
131 static int xxs1500_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
134 if(info->sock > PCMCIA_MAX_SOCK) return -1;
135 info->irq = PCMCIA_IRQ;
136 return 0;
140 static int
141 xxs1500_pcmcia_configure_socket(const struct pcmcia_configure *configure)
144 if(configure->sock > PCMCIA_MAX_SOCK) return -1;
146 DEBUG("Vcc %dV Vpp %dV, reset %d\n",
147 configure->vcc, configure->vpp, configure->reset);
149 switch(configure->vcc){
150 case 33: /* Vcc 3.3V */
151 /* turn on power */
152 DEBUG("turn on power\n");
153 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<14))|(1<<30),
154 GPIO2_OUTPUT);
155 au_sync_delay(100);
156 break;
157 case 50: /* Vcc 5V */
158 default: /* what's this ? */
159 printk(KERN_ERR "au1x00_cs: unsupported VCC\n");
160 case 0: /* Vcc 0 */
161 /* turn off power */
162 au_sync_delay(100);
163 au_writel(au_readl(GPIO2_PINSTATE) | (1<<14)|(1<<30),
164 GPIO2_OUTPUT);
165 break;
168 if (!configure->reset) {
169 DEBUG("deassert reset\n");
170 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<4))|(1<<20),
171 GPIO2_OUTPUT);
172 au_sync_delay(100);
173 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<5))|(1<<21),
174 GPIO2_OUTPUT);
176 else {
177 DEBUG("assert reset\n");
178 au_writel(au_readl(GPIO2_PINSTATE) | (1<<4)|(1<<20),
179 GPIO2_OUTPUT);
181 au_sync_delay(100);
182 return 0;
185 struct pcmcia_low_level xxs1500_pcmcia_ops = {
186 xxs1500_pcmcia_init,
187 xxs1500_pcmcia_shutdown,
188 xxs1500_pcmcia_socket_state,
189 xxs1500_pcmcia_get_irq_info,
190 xxs1500_pcmcia_configure_socket